EP0668549A2 - Reinigungsvorrichtung für eine Fixiereinheit - Google Patents

Reinigungsvorrichtung für eine Fixiereinheit Download PDF

Info

Publication number
EP0668549A2
EP0668549A2 EP95300643A EP95300643A EP0668549A2 EP 0668549 A2 EP0668549 A2 EP 0668549A2 EP 95300643 A EP95300643 A EP 95300643A EP 95300643 A EP95300643 A EP 95300643A EP 0668549 A2 EP0668549 A2 EP 0668549A2
Authority
EP
European Patent Office
Prior art keywords
cleaning device
bristles
set forth
rows
tufts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95300643A
Other languages
English (en)
French (fr)
Other versions
EP0668549A3 (de
EP0668549B1 (de
Inventor
Luciano Rosso
Antonio Saraceno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olivetti Canon Industriale SpA
Original Assignee
Olivetti Canon Industriale SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olivetti Canon Industriale SpA filed Critical Olivetti Canon Industriale SpA
Publication of EP0668549A2 publication Critical patent/EP0668549A2/de
Publication of EP0668549A3 publication Critical patent/EP0668549A3/de
Application granted granted Critical
Publication of EP0668549B1 publication Critical patent/EP0668549B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/2064—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat combined with pressure
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/2017—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means
    • G03G15/2025—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means with special means for lubricating and/or cleaning the fixing unit, e.g. applying offset preventing fluid
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/20—Details of the fixing device or porcess
    • G03G2215/2003—Structural features of the fixing device
    • G03G2215/2016—Heating belt
    • G03G2215/2022—Heating belt the fixing nip having both a stationary and a rotating belt support member opposing a pressure member

Definitions

  • the present invention relates to a cleaning device for a fixing unit capable of fixing an image produced for example by an electric photocopier or the like on a support essentially formed by a fuser assembly, in contact with which there moves a film that is rolled up in a ring configuration to form an endless belt which is set in motion by an entrainment roller which transmits a drive torque to the film by means of the friction between its external surface and the internal surface of the film with which it is in contact, and more particularly a cleaning device capable of removing contaminating particles from the external surface of the entrainment roller, keeping it clean for the purposes of maintaining constant in respect of time the coefficient of friction as between the film and the entrainment roller.
  • a fixing unit is known in the current state of the art, which is formed by:
  • the entrainment roller transmits a drive torque to the belt to make it move by means of the frictional force between its external surface and the internal surface of the belt with which it is in contact; that frictional force depends on the tension of the belt, the angle through which it is wrapped around the entrainment roller and the coefficient of friction between the two materials constituting the external surface of the entrainment roller and the internal surface of the belt.
  • the movement of the film is opposed substantially by a resistant torque generated by the frictional force between the internal surface of the belt and the external surface of the heating element.
  • Preferred embodiments of the present invention provide a device which, without maintenance intervention operations, provides for removing the contaminating particles from the external surface of the entrainment roller, keeping it clean and thus making the coefficient of friction as between the entrainment roller and the belt substantially constant for the entire life of the fixing unit.
  • FIG 1 diagrammatically shows a fixing unit 10 formed by a fuser assembly 20 and a film of heat-resistant material which is rolled up in the form of an endless belt 14 which is rotatable about a motor-driven entrainment roller 15 and an idle tensioning roller 16.
  • a pressure roller 22 which is external to the belt 14 applies a pressure between the fuser assembly 20 and the belt 14.
  • the fuser assembly 20 is formed by a rigid carrier 26, for example of metal, to which a support 28 of heat-resistant resin is secured; fixed on the support 28 is a heating element 30 formed by an alumina base 32 on which a resistor 33 is deposited by means of the "thick-film" procedure, which resistor 33 can heat up to a temperature of about 250°C when it is supplied with a current generated by an electrical power source which is external to the fusion unit.
  • the surface 30a of the heating element 30 in contact with the film 14 is protected by an anti-friction and anti-wear layer 35 formed for example by glass or by amorphous carbon in the form of diamond or by both deposited in succession.
  • the entrainment roller 15 is formed by a core 15a of steel which is covered by a rubber layer 15b while the tensioning roller 16 is entirely of steel and is connected to earth at 9 to remove the electrostatic charges which may be generated on an internal surface 14a of the belt 14.
  • the pressure roller 22 which is disposed at a position corresponding to the fuser assembly 20 and externally to the belt 14 is formed by a core 23 of steel which is covered by a thick layer 24 of rubber with high characteristics in regard to resilience (for example silicone rubber), which is capable of deforming under the action of a force applied by means (not shown in the drawing) thereby to form a compressed contact zone "L".
  • the belt 14 is caused to rotate by the entrainment roller 15 by means of the frictional force which exists between an external surface 17 of the rubber layer 15b covering the entrainment roller 15 and the internal surface 14a of the belt 14.
  • Various materials are known in the state of the art, which are capable of providing a high coefficient of friction, for example the internal surface 14a of the belt 14 is made of polyamide resin and the rubber layer 15b is made of silicone rubber, so that at the beginning of operation of the fixing unit 10 the belt 14 is entrained without slipping with respect to the roller 15. With use however a multiplicity of contaminating particles are formed and deposited on the external surface 17 of the entrainment roller 15, progressively reducing the coefficient of friction between the belt 14 and the roller 15.
  • These are formed primarily because of the rubbing action as between the internal surface 14a of the belt 14 and the protective layer 35 of the fuser assembly 20, and the consequent abrasion.
  • These may also be paper powder and particles of toner which are formed as a result of the movement through the fixing unit 10 of the supports 12 which are mainly formed by pre-cut sheets of paper carrying an image developed with toner 25 which has not yet fused.
  • the effect of the reduction is increased by the simultaneous increase in the frictional force as between the film 14 and the fuser assembly 20 due to progressive deterioration in the anti-wear and anti-friction layer 35, which is caused by the above-mentioned abrasion effect.
  • This finally results in slippage of the belt 14 with respect to the entrainment roller 15, with the consequence that the belt 14 stops and the fixing unit 10 is rendered inoperable.
  • a cleaning device 13 in the form of a small brush which is fixed to a rigid support 11 and which extends in parallel relationship with the entrainment roller 15, being disposed inside the belt 14 in such a way as to be in contact over its entire length with the external surface 17 along a generatrix of the entrainment roller 15.
  • the cleaning device 13 is formed by a support fabric or cloth 13a and a plurality of hairs or bristles 13b which are in part rigid and in part flexible, wherein the rigid bristles 13b' (see Figure 2) have the task of removing all the contaminating particles which are deposited on the external surface 17 and the flexible bristles 13b'' have the task of retaining and collecting the contaminating particles, in order to keep the coefficient of friction as between the entrainment roller 15 and the belt 14 substantially constant in respect of time without the need to carry out maintenance operations to re-clean or replace the cleaning device 13 during the service life of the fixing unit 10.
  • the Tex is a unit of measurement used in the textile industry to measure the fineness of fibre expressed by the weight in grams of 1000 m of thread (specific weight).
  • tuft 13c is used to denote a portion of thread which is inserted into the support cloth and bent in half onto itself in such a way as to present its two ends in side-by-side relationship and projecting from the same part with respect to the support cloth and constituting two distinct individual threads.
  • the cleaning device according to the present invention may be the subject of modifications in terms of the materials and the arrangement of the bristles, and additions and/or substitutions of parts without however thereby departing from the scope of the invention.
EP95300643A 1994-02-21 1995-02-01 Reinigungsvorrichtung für eine Fixiereinheit Expired - Lifetime EP0668549B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO940102 1994-02-21
IT94TO000102A IT1267395B1 (it) 1994-02-21 1994-02-21 Dispositivo di pulizia per unita' di fissaggio

Publications (3)

Publication Number Publication Date
EP0668549A2 true EP0668549A2 (de) 1995-08-23
EP0668549A3 EP0668549A3 (de) 1996-03-06
EP0668549B1 EP0668549B1 (de) 1999-08-25

Family

ID=11412166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95300643A Expired - Lifetime EP0668549B1 (de) 1994-02-21 1995-02-01 Reinigungsvorrichtung für eine Fixiereinheit

Country Status (4)

Country Link
US (1) US5534985A (de)
EP (1) EP0668549B1 (de)
DE (1) DE69511597T2 (de)
IT (1) IT1267395B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0838734A2 (de) * 1996-10-28 1998-04-29 Sumitomo Electric Industries, Ltd. Anordnung mit Wärmefixierung
US6078027A (en) * 1997-09-17 2000-06-20 Sumitomo Electric Industries, Ltd. Ceramic fixing heater containing silicon nitride
EP1191407A1 (de) * 2000-09-26 2002-03-27 Heidelberger Druckmaschinen Aktiengesellschaft Reinigungsbürste und Verfahren zum Entfernen von Verunreinigungen von einem photoleitenden Film
JP2011053380A (ja) * 2009-09-01 2011-03-17 Ricoh Co Ltd 定着装置及び画像形成装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5970872A (en) * 1997-03-14 1999-10-26 Iwatsu Electric Co., Ltd. Fixing apparatus for a wet-type plate making machine
DE102005054489B4 (de) * 2005-11-16 2008-01-31 Keiper Gmbh & Co.Kg Beschlag für einen Fahrzeugsitz
JP6237379B2 (ja) * 2014-03-24 2017-11-29 富士ゼロックス株式会社 定着装置および画像形成装置
JP6864870B2 (ja) * 2017-05-16 2021-04-28 株式会社リコー 定着装置及び画像形成装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS572074A (en) * 1980-06-06 1982-01-07 Ricoh Co Ltd Fur brush of dry type electrophotographic copying machine
EP0089432A1 (de) * 1981-01-06 1983-09-28 Schlegel Corporation Reinigungsbürste für elektrostatische Kopiergeräte, Drucker oder dergleichen
JPS60144779A (ja) * 1984-01-05 1985-07-31 Matsushita Electric Ind Co Ltd 感光体走行装置
US4673284A (en) * 1980-04-26 1987-06-16 Ricoh Company, Ltd. Cleaning device
JPH05188801A (ja) * 1992-01-08 1993-07-30 Canon Inc 加熱装置
JPH06236134A (ja) * 1992-12-08 1994-08-23 Fuji Xerox Co Ltd 画像形成装置のクリーニング装置
JPH06337611A (ja) * 1993-05-31 1994-12-06 Canon Inc 定着装置

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3883292A (en) * 1973-05-29 1975-05-13 Xerox Corp Sleeveless pressure roll cleaner
US3980424A (en) * 1975-04-28 1976-09-14 Xerox Corporation Fuser cleaning roller
US4277161A (en) * 1979-12-10 1981-07-07 Pitney Bowes, Inc. Cleaner for pressure fixing roller
US4407219A (en) * 1981-07-14 1983-10-04 Schlegel Corporation Pile brush for conditioning a moving surface
NL8501717A (nl) * 1985-06-14 1987-01-02 Oce Nederland B V Patents And Contactfixeerinrichting.
JPH0814740B2 (ja) * 1986-10-17 1996-02-14 日立工機株式会社 定着ローラの清掃装置
JP2526925B2 (ja) * 1987-09-19 1996-08-21 ミノルタ株式会社 トナ―回収方法
US5162634A (en) * 1988-11-15 1992-11-10 Canon Kabushiki Kaisha Image fixing apparatus
EP0373651B1 (de) * 1988-12-14 1995-05-17 Canon Kabushiki Kaisha Reinigungsblatt für drehbares Fixierglied und Bilderzeugungsgerät mit drehbarem Fixierglied
JPH03177870A (ja) * 1989-12-07 1991-08-01 Toshiba Corp 定着装置
US5218410A (en) * 1990-12-29 1993-06-08 Mitsubishi Materials Corporation Cleaning roll material and fixing apparatus
KR950000416B1 (ko) * 1992-10-08 1995-01-19 현대전자산업 주식회사 사무자동화기기의 인쇄용지 정착장치
US5327203A (en) * 1993-01-04 1994-07-05 Xerox Corporation Web release agent system for a heat and pressure fuser

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673284A (en) * 1980-04-26 1987-06-16 Ricoh Company, Ltd. Cleaning device
JPS572074A (en) * 1980-06-06 1982-01-07 Ricoh Co Ltd Fur brush of dry type electrophotographic copying machine
EP0089432A1 (de) * 1981-01-06 1983-09-28 Schlegel Corporation Reinigungsbürste für elektrostatische Kopiergeräte, Drucker oder dergleichen
JPS60144779A (ja) * 1984-01-05 1985-07-31 Matsushita Electric Ind Co Ltd 感光体走行装置
JPH05188801A (ja) * 1992-01-08 1993-07-30 Canon Inc 加熱装置
JPH06236134A (ja) * 1992-12-08 1994-08-23 Fuji Xerox Co Ltd 画像形成装置のクリーニング装置
JPH06337611A (ja) * 1993-05-31 1994-12-06 Canon Inc 定着装置

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006 no. 059 (P-110) ,16 April 1982 & JP-A-57 002074 (RICOH CO LTD) 7 January 1982, *
PATENT ABSTRACTS OF JAPAN vol. 009 no. 314 (P-412) ,10 December 1985 & JP-A-60 144779 (MATSUSHITA DENKI SANGYO KK) 31 July 1985, *
PATENT ABSTRACTS OF JAPAN vol. 017 no. 611 (P-1641) ,10 November 1993 & JP-A-05 188801 (CANON INC) 30 July 1993, *
PATENT ABSTRACTS OF JAPAN vol. 018 no. 621 (P-1832) ,25 November 1994 & JP-A-06 236134 (FUJI XEROX CO LTD) 23 August 1994, *
PATENT ABSTRACTS OF JAPAN vol. 95 no. 3,28 April 1995 & JP-A-06 337611 (CANON INC) 6 December 1994, *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0838734A2 (de) * 1996-10-28 1998-04-29 Sumitomo Electric Industries, Ltd. Anordnung mit Wärmefixierung
EP0838734A3 (de) * 1996-10-28 1999-01-27 Sumitomo Electric Industries, Ltd. Anordnung mit Wärmefixierung
US6049064A (en) * 1996-10-28 2000-04-11 Sumitomo Electric Industries, Ltd. Heat fixing device for fixing a toner image
US6078027A (en) * 1997-09-17 2000-06-20 Sumitomo Electric Industries, Ltd. Ceramic fixing heater containing silicon nitride
EP1191407A1 (de) * 2000-09-26 2002-03-27 Heidelberger Druckmaschinen Aktiengesellschaft Reinigungsbürste und Verfahren zum Entfernen von Verunreinigungen von einem photoleitenden Film
US6673159B1 (en) 2000-09-26 2004-01-06 Heidelberger Druckmaschinen Ag Cleaning brush and method for removing contaminates from a photoconductor film
JP2011053380A (ja) * 2009-09-01 2011-03-17 Ricoh Co Ltd 定着装置及び画像形成装置
CN102004427A (zh) * 2009-09-01 2011-04-06 株式会社理光 定影装置以及图像形成装置
CN102004427B (zh) * 2009-09-01 2013-04-17 株式会社理光 定影装置以及图像形成装置

Also Published As

Publication number Publication date
EP0668549A3 (de) 1996-03-06
DE69511597T2 (de) 2000-01-20
ITTO940102A0 (it) 1994-02-21
IT1267395B1 (it) 1997-02-05
DE69511597D1 (de) 1999-09-30
US5534985A (en) 1996-07-09
ITTO940102A1 (it) 1995-08-21
EP0668549B1 (de) 1999-08-25

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